Milk of calcium renal stoneの1例

Abstract

A case of milk of calcium renal stone was reported. The patient was 28-year-old male who was admitted with right flank pain and hematuria. Abdominal plain film showed an oval positive shadow at his right kidney region in supine position, but in standing and lateral position the shadow changed its form to a half-moon shape. Diagnosis of milk of calcium renal stone of cystic type was made. Excision of the cyst with lithotomy was performed and 12.5 ml yellowish fluid in the cyst were obtained. Then 703 tiny brown stones were removed. The main composition of the stones was calcium oxalate. There was a macroscopicial communication between cyst and calyx, and the inner surface of excised cyst consisted of transitional epithelium in histological examination. Thirty-one cases (our case and 30 cases collected from literatures in Japan) of milk of calcium renal stone were reviewed.